<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script type='text/javascript' src='../js/vue.js'></script>

</head>

<body>
    <div id="root">

        <h2>人员列表</h2>
        <input type="text" v-model="keyWord" placeholder="请输入名字">
        <button @click="sortType = 2">年龄升序</button>
        <button @click="sortType = 1">年龄降序</button>
        <button @click="sortType = 0">原始顺序</button>
        <ul>
            <li v-for='(person,index) in filterPersons' :key='person.id'>
                {{index}}--{{person.name}}-{{person.age}}
            </li>
        </ul>


    </div>
    <script>
        Vue.config.productionTip = false;

        new Vue({
            el: '#root',
            data: {
                keyWord: '',
                sortType: 0,
                persons: [
                    { id: '001', name: '马冬梅', age: 18 },
                    { id: '002', name: '周冬雨', age: 16 },
                    { id: '003', name: '周杰伦', age: 21 },
                    { id: '003', name: '温兆伦', age: 19 },
                ],
            },
            // 计算属性实现
            computed: {
                filterPersons() {
                    const arr = this.persons.filter((p) => {
                        return p.name.indexOf(this.keyWord) !== -1
                    })
                    //判断是否需要排序
                    if (this.sortType) {
                        arr.sort((p1, p2) => {
                            return this.sortType === 1 ? p2.age - p1.age : p1.age - p2.age;
                        })
                    }
                    return arr;
                }

            }


        })
    </script>
</body>

</html>




<!-- 
    VS问题：open with live server如果显示server is already running ... 
    alt+L  alt+C
-->

<!-- P32 -->